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Stock-Based Compensation Plans - Valuation Assumptions for Grant Date Fair Value of Performance Awards (Detail) - Performance Share - $ / shares
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Risk-free interest rate 4.20% 4.10%
Expected annual volatility 46.00% 56.00%
Grant date fair value per unit $ 44.39 $ 31.84